Apparatus for molding concrete and like plastic substances



July 11, 1933. F. scHLAGlNTwElT 1,917,738

APPARATUS FOR MOLDING CONCRETE AND LIKE PLASTIC SUBSTANCES Filed May 10, 1952 -2 SheelS-Sheel. l

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A TTR/VEY Jly M, 1933-. F. scHLAGlNTwEIT APPARATUS FCR MCLDING CONCRETE AND LIKE PLASTIC sUBsTANCEs Filed May lO, 1932 2 Sheets-Sheet 2 Fig. ifea/zij.

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13% )il 14A heroines distorted, so that in ee enemies sin? 11, i933 UNT @STATES iinrnnniois sonneernwnii, or BADEN-BADEN, GERMANY AABATUS FOR IvOLDNG AND-LKE ?LAS''IC SBSTANCES Application nien llfay 10, 1932, Serial No. 610,431, and iii-Great Britain- .Tnly Y7, 1931.

This invention relates to apparatus for molding concrete and like plastic inateri'als and niore particularly to apparatus Jrer the inanuiaeture of reinforced Concrete beanie',

in which the tivo side walls of the inold in their Working position are pressed against the bottoni oi the inold by means of a ninnber ot earn or like devises'arranged along the len "h ot the mold, and after thefloosening of upwards or ing appara the inold when in the Working held tirinly against the bottoni in the vertical direction solely tion prooueed by nie-ns oif the downwards. lira known inoldas oit this type the side Walls oi position are oil the mold by the 'frieeains. This friction does not, however, sntliee Vlo prevent anyr vertical :,lisplaeen with absolute certainV y y oi the mold when the nient ot the side iva'.

concrete is being rammed ily a vertical displacement of' this kine, moreover, the inold tain eireuinstanees the ino ded 'work rendered usewie ininroved apparatus in aecordanee with t he i i'nventi n the Cain or like devices fory demis' the side Walls of the mold an; i i ist the bottoni thereof are actuated by a:'pluralityV et levers which vin operative prosition also spport the side Walls in correct Vertical re ion to the bottom oi' the inold.

Another teatri o'l the improved machine resi les in L-he *fart that the Cain or like devices arranged a Aong the length ot the mold l tor closing the side walls o'l`i the mold against the bottoni thereof' are acted upon by a pluralit' of levers operated from a eonnnon aelnatl g member.

Flach lever is preferably constituted 1n the i torni of a forli at the upper end Whiehembraves the tivo side Walls of the niold, ivhile the pron ot the forli serve as abutment-s for he nains nariied by the side Walls oi the molds or are themselves provided 'with fain lia-ees. To enable the Walls of the mold or'the construction of girders of dillerent dimensions to be olaeed at different distances apart, the cams lare, according to the invention, ad'- justa'bletransversely in relation to the side walls'o'l the mold. Siinultaneously with the diese earns the Walls can be swung apartA Vchange in the position ofthe Canis the bottoni of the inold inust, 'of Course, also be changed. p i n ln order that on the tightening or `loosening oi the earns no longitudinal displacement 55 oi the vside walls of the inold due to the forces thereby set up may occur, the Cain fases are, according to the invention, inclined partly in one direction, partly in the other direction, in relation to the side Walls of the Inoldf. Similarly, the rocking levers are swung by groups in oppositedirections. j

ln this type of fniaehiiie, the inold Walls must be capable of being inoved jointly a slight distance before the mold Walls can be 6 ipped from the Worli Until this 'coninion descending movement of the inoldivalls vis completed, the roeliing levers' inustveontiiiue to aet as supporting ineinberslor theside Walls of the mold, i. e.V they inust be positively controlled. Thisis permitted by the common actuating ineans hereinafter described indetail; vThe invention isl intended to be used par-v ticularly withV a molding device in WhiCh-the '7 side Walls of the inold are `l'lexibly Connected, in known manner, at each end ofthe deviee, to a parallel motion linkage so that one side wall nieves upwards Vand the yother doivn- Wards. Here, in order to ensure that thevs'ide Walls of the mold be kept exactly parallel when 'beingy Withdrawn troni the ,vinolded Work, at least one lever of the linkageatone end of the niaohine is, rigidly vlConnectedl with 'he corresponding link at theotherend by *8 nieans ol a rod which serves asa pivot.v

ln the accompanying drat'vingsivhieh il insti-ate diagraniuuatically one embodiment ot the invention .v

Figs, 1 and''show the mold arrangements 9 with' the' side yWalls inthe Working position, in side viewand in plan resireetively.l l.

Fig. anelnd elevation ofthe arrange# nient to enlarged scale. y y Y` f el isa section to enlarged'seale on the line fl-ffl'of Fig. 1. I l l The' two side walls 1 and 2 of the mold which are eonstructedin the foi-'ni ofehannelA seetions'are provided atY their ends with vertical supports' 3' and l, directed dovvnwards. Each two supports placed on the same end of the device are flexibly connected with two links and 6 by means of pivots 5a and 5b, 6a and Gb, these links being connected by means of pivots 7 and S by a vertical support 9 of the framework of the device and forming a parallel motion linkage. The pins 5a, 5b and 6a, 6?) which vare accommodated iny holes of the supports 3 and areallowed play in the vertical direction, so that thetwo supports can be raised or lowered eonjointly with the mold walls 1 and 2, to a slight extent. The mold bottom 10, which is preferably composed of several timber sections, rests together with the molded worl' l1 on a number of horizontal rails 27 carried by the framework. In order to withdraw the work after molding, the'side pressure on the side walls of the mold is removed, and these walls are swung apart, the wall 2 moving upwards and the wall 1 downwards, into the positions indicated by the dotted lines in Fig. 3, whereupon the ymold bottom 10 together with the work 11 can be pushed out of the mold on to side supports 12.

For pressing the side walls 1 and 2 of the mold, against the bottom 10 of the mold and `for holding the walls in position during molding, each of the side walls carries cams 13a and 13b and a. corresponding number of rocking levers 14a and 1&6 co-operating with these cams. The rocking levers 14a and 14?) are positioned in the framework 15 onV pivots 1G, and their upper ends are constructed in the form of forks 28, which embrace the two side walls 1 and 2 ofthe mold. These forks serve as abutments yfor the cams 13a and 137). The faces of the cams 18a arranged on each side of the mold are inclined in relation to the mold wall in one direction, while the faces of the other two cams 13b are inclined inthe opposite direction. Accordingly the leverslllo and 14h must also be swung in opposite directions by means to be described in more detail later on. The cams 13a and 13b are, moreover, arranged obliquely to the horizontal -plane passing through the side walls of the mold. Each cam preferably consists of two parts, one of which (13e) is fixed to kthe mold Wallin question, while the other (13av or 13b) is adjustable. transversely to Vthe mold' wall and can be locked in different positions by bolts 13d operating in slotted holes 13e to provide for variations in the width of the mold. In the example illustrated the portion 13e consists of a bar of T- section and the adjustable parts 13a or 13b consist of pairs of plates adjustably secured thereto.

In the forked end of each ofthe rocking levers 14a and 141) are positioned two rollers 17, which serve as supporting members for the side walls l and 2 of the moldand hold them in exact vertical relation to the bottom during the molding operation.

lV hen the rocking levers are moved to locking position as shown in full lines in Fig. 1 the rollers 17 lift the side walls 1, 2 slightly, the slotted holes in the supports 3, et permitting this movement. Each two rocking levers 14a, lila and 14o, 14h are connected at their lower ends by a horizontal li iik-rod 18 and 18a. so that the levers are parallel to each other at( any angle of adjustment.

Approximately in the centre of the framework a hand lever 2O is positioned so that it can swing about a pivot 21. T his hand lever 20, by means of two push links and 22?) acting on both sides of its pivot-pin, is connected with two horizontal slides 23a. and 225?) positioned in the lower part of the framework, so that by swinging the hand lever these slides 23a and 23o are displaced in opposite directions. Each slide is provided with an upper recess 24a, 25o into which passes a projecting lip 2G carried between the lower ends of a rocking lever l-la and 14h. By the arrangement of the rocking levers 14a and 1lb in the recesses 2411. and 211:6 the said levers on the reciprocal movement of the slides 23a and 23() are also actuated by these latter. lThe levers are moved by these slides only over a certain distance, which suilices to bring into or place out of operation the cam devices and previously to raise and subsequently to lower the side walls 1 and 2 of the mold conjointly to a slight extent oy means of the rollers 17 in the manner above described. lVhen the levers have been moved to release the pressure on the side walls, the lips 26 can be lifted out of the recesses 24a, 250 by the descending mold wall 1 as it moves to the position shown in dotted lines in Fig. 3. Vhen the mold walls 1 and 2 are swung up again to the same level, the lips 2G drop back into the recesses 24a and 24?).

A rod extends over the entire length of the machine and is fixed at each end to the links G and the projecting ends 8 of this rod 25 form the pivots for the links 6, and thus ensures that the two mold walls 1 and 2 are kept exactly parallel.

I claim l. Apparatus for molding` concrete articles of the character designated comprising in combination a mold ha ving side walls movable in relation to the bottom, cam devices for closing said lside walls against the bottom of the mold, levers engaging said cam devices,-said levers also supporting the side walls in correct vertical relation to the bottom of the mold.

2. Apparatus for rmolding concrete articles of the character designated comprising inv combination a. meid having side walls movable in relation to the bottom, means for adjusting said cam devices transversely in relation to the side walls to provide for beams of varying width, levers engaging said camdeviees, said levers also supporting the bottom of the mold, levers engaging said cam devices, said levers being forked at their upper ends and carrying supporting rollers for the side walls of the mold.

4. Apparatus klfor .molding concrete articles oi the character designated comprising in combination a mold having side walls movable in relation to the bottoni, cam devices` arranged along the length of the mold ior closing said side walls against thek bottoni or the mold, the cam devices at one end ol the machine being inclined in the opposite direction to those at the other end or' the machine, and Vlevers lor engaging said, cam

devices operated from a common member.

5. Apparatus for molding concrete articles oi the character designated comprising in combination a mold having side walls movable in relation to the bottom, cam de vices, levers engaging said cam devices supporting the side walls in correct vertical relation to the bottom of the mold and operated from a common actuatingl member,

said actuating member driving in opposite directions two slides each ot' which is ie-I cessed to engage said levers in such a manner 'u the levers are released from theslide rer the looseningr of the cani devices.

6. Apparatus 'for molding concrete arti cles oli the character designated. comprising in combination mold having side walls movable in relationto the bottom, means igory pressing said side walls against the bottom of the mold, and means for allowing said side walls to move in the same direction after the pressure is released and then causing said side walls to move in opposite directions.

7. Apparatus for molding concrete articles or thiocharacter designated comprising in combination a moldY having side walls movable in relationto the bottom, cam devices, levers engaging said cam devices supi'iorting the side walls in correct vertical relation to the bottom ot' the mold, said levers being forked at tueir upper ends and carrying` rollers for supporting the si -e walls oi' the mold, and being operated from a coninion actuating member, said actuating niember driving in oiiposite directions two slides each of which is recessed to engage said levers in such a manner that the levers are lthe linkage.

released from the slide after theloosening ot' the cam devices.

8. Apparatus for molding concrete articles of the character designated comprising in coinbin ation a mold having side walls inevable in relation to the bottom, said side walls being provided at each end of the machine with a parallel motion linkage permitting one ywall to move upwards and the other wall downwards, said linkages being int-erconnected by a rod passing through the Ina- Y chine and carrying at each end a pivot of 9. Apparatus AIjor molding concrete articles of the character designated comprising in combination a mold having side walls movable in relation to the bottom, means 'for connecting the sido walls, said means allowing a small downward movement oi' both the sidewalls on release of the pressure fromk their sides, to i'ree them Jfrom the work and causing one wail' subsequently to move upward and the other wall downward.

l0. Apparatus for molding concrete articles of the character designated comprising in combination a mold having side walls movable in relation to the bottom, cam devices arranged at intervals along the length ot the mold for closing said walls against the bottoni oi the mold, a plurality of levers each acting uponfone olf said vcam devices, link rods connecting the levers on each end with each other, a hand lever" placed approximately centrally along the length of the side walls and connecting links causing movement to be transferred from said hand lever to said cani actuating levers, whereby the actuating levers on one end of the ma-y chine are caused to swing in one direction and the other end levers are caused rto swing in the opposite directionto eie'ctV closure'otv the side walls of the mold.

il. Apparatus for molding concrete articles of the character designated comprising in combination a mold having side walls movable in relation to the bottom, cam devices arranged at intervals alongthe length of the mold for closing said walls against the bottom of the mold, a plurality of levers each acting upon one of said cam devices, projecting lips on said cam actuating levers, a

FRIEDRICH SCHLAGINTVVEIT. 

